Maestría en Manejo, Uso y Conservación del Bosque
URI permanente para esta colecciónhttp://hdl.handle.net/11349/23
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Examinando Maestría en Manejo, Uso y Conservación del Bosque por Materia "Alpha and beta – diversity"
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Ítem Diversidad de colémbolos epiedáficos en plantaciones forestales de Acacia mangium Willd y sabanas en la Orinoquia colombianaRamos Díaz, Adriana; Pinzòn Florián, Olga PatriciaCollembolans play key ecological role in the organic matter decomposition and nutrient cycling and are considered as land use change indicators. In order to estimate changes in the Collembola community diversity by the establishment of Acacia mangium plantations in savannas, plantations of three ages and savannas were sampled in the Puerto Gaitán municipality (Meta, Colombia) during the wet period (September 2014) and dry season (March 2015). To estimate and compare the diversity of epiedaphic species of Collembola (that is, those that live on the surface of the soil and leaf litter) (diversity q0, q1, q2), a sampling using pitfall traps was arranged in three linear transects per plot. In order to explain collembolan assemblage soil physicochemical variables and plantations elements were measured in each transect and correlated with Collembola diversity through a redundancy analysis (RDA). Also, to identify which genera show preference to certain coverage, an indicator species analysis was carried out. Collembola assemblage was explained by: vegetation type, season, and soil physicochemical characteristics. The plantations favored the diversity and abundance of Collembola epiedaphic species in the first five years since the plantation establishment. The dry season had a more limiting effect on the epiedaphic Collembola abundance and diversity in the savannas, than the plantation establishment; taking into account that collembolan diversity in the dry season was 78% lower than in the wet period. Six of the 19 variables studied explained Collembola abundance and / or richness in the studied areas (soil temperature and humidity, plantation development (height), clay content, organic carbon and compaction). It is concluded that early stages of A. mangium forest plantations favor collembolan diversity in the study area. However, more studies are needed to better understand soil ecological impacts in longer periods.